The first time I sold some jewelry, I sold it to my friend's neighbor who was a jeweler. I trusted her, and the price was great! Then I saw a sign advertising a local jeweler in my area (New Jersey) who buys jewelry for cash. There were several people in there selling jewelry, and I felt that I got a good price for the gold. Actually, I was quite amazed that I got as much as I did, so I didn't see any reason to price it with other jewelers. I truly had not used any of the pieces that I sold in years, and many of the other chains were broken or twisted. I now have a gorgeous new ring to show for it!!!
Check your local jewelry stores - many reputable jewelers have signs up that they buy old jewelry, and you'll be pleasantly surprised! Good luck!